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AssigneeE. I. Du Pont de Nemours and Company
InventorsKenneth Batzar, Jeffrey Hugh Hamilton, Alan C. Herzer, Thomas J. Leck, Christopher Mark Rey
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Smooth, patterned substrates useful in producing decorative cookware are formed by coating a base with a mixture of fluoropolymer and magnetic flakes and magnetically inducing an image in the polymer coating composition. The baked fluoropolymer release coating contains magnetizable flakes, a portion of the flakes being oriented in the plane of the substrate and a portion of said flakes being magnetically reoriented to form a pattern in the coating which is observed in reflected light, the flakes having a longest dimension which is greater than the thickness of said coating. The patterned substrate is formed by applying magnetic force through the edges of a magnetizable die positioned under a coated base to induce an imaging effect or pattern. The coating composition is then cured resulting in a smooth surface, patterned nonstick finish on the substrate.
A substrate having a baked fluoropolymer release coating thereon, said coating containing magnetizable flakes, a portion of said flakes being oriented in the plane of said substrate and a portion of said flakes being magnetically reoriented to form a pattern in said coating which is observable in reflected light, said flakes having a longest dimension which is greater than the thickness of said coating.
Process for forming a patterned release coating on a nonmagnetizable substrate, comprising
Dependencies are inferred from the claim text.